S
M
T
W
T
F
S
26
82°
59°
27
82°
62°
28
81°
59°
29
84°
64°
30
83°
63°
1
85°
64°
2
85°
63°
3
82°
58°
4
84°
62°
5
84°
64°
6
83°
65°
7
84°
66°
8
85°
66°
9
85°
65°
10
84°
66°
11
80°
66°
12
85°
61°
13
80°
64°
14
81°
67°
15
83°
67°
16
86°
68°
17
86°
69°
18
87°
68°
19
83°
68°
20
82°
69°
21
85°
69°
22
87°
68°
23
84°
69°
24
86°
70°
25
85°
70°
26
87°
69°
27
87°
70°
28
85°
70°
29
86°
66°
30
85°
68°
31
87°
65°
1
86°
67°
2
88°
66°
3
91°
67°
4
90°
66°
5
92°
67°
6
89°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Plum Grove
Plum Grove's May 2026 forecast shows daily high temperatures ranging from 80° to 92°, with overnight lows between 58° and 70°. The average high for May is 85° with an average low of 66°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Plum Grove. See also: June | July | August.